Table 1.
Results of the data analysis. Values on each line with an astericks (*) or dagger (†) were not significantly different from one another.
| Parameter | BioBase group, mean (SD) | Control group, mean (SD) | Rumination group, mean (SD) | F value | P value | Effect size, partial eta squared |
| Heart rate, bpm | 74.02 (9.25)* | 78.52 (9.32)* | 79.53 (10.40)* | 2.58 | .08 | .07 |
| RMSSDa | 65.9 (20.51) | 39.88 (20.73)* | 43.77 (27.46)* | 9.25 | .001 | .22 |
| pNN50b | 30.14 (10.89) | 16.26 (15.34)* | 18.14 (15.34)* | 9.17 | .001 | .21 |
| High frequencyc | 2.97 (0.37)* | 2.74 (0.39)*,† | 2.65 (0.37)† | 4.15 | .02 | .11 |
aRMSSD: root mean square successive difference.
bpNN50: percentage of successive inter-beat RR intervals that differ by >50 ms.
cLog transformed.